front brake lock under hard braking
Thread Starter
Newbie
Joined: May 2017
Posts: 6
Likes: 1
From: Houston Texas
2003 E500
front brake lock under hard braking
I have perused the forum to find a solution to my issue but haven't come across anything. (I am not the best at this so I may have overlooked something). Under hard braking and firm braking (dry pavement 40-50mph) I have had the front wheels lock up extending the stopping distance and causing flat spots on my tires. Obviously, ABS should not be locking the wheels for an extended period of time. I don't have any codes or indicators showing on the dash. After releasing the brake the car drives as normal. I am willing to throw some parts (a little $$) at it to fix the issue but I need a place to start. Am I looking to the wheel ABS sensor, the Yaw sensor, the ESP control module or the dreaded ABS block?
Thread Starter
Newbie
Joined: May 2017
Posts: 6
Likes: 1
From: Houston Texas
2003 E500
I will give these a shot.
I don't know how old the fluid is, I just got the car. I will have it changed.
The rear pads are low, and seem to be putting out a lot more dust than the fronts, Im thinking they are a different compound. I will change them.
Yes, it has the SBC and definitely feels different.
Will a trouble code be stored somewhere that can be retrieved even tho there are no indicator lights on the dash?
Is a scanner like Actron 9680 capable of retrieving these codes?
The rear pads are low, and seem to be putting out a lot more dust than the fronts, Im thinking they are a different compound. I will change them.
Yes, it has the SBC and definitely feels different.
Will a trouble code be stored somewhere that can be retrieved even tho there are no indicator lights on the dash?
Is a scanner like Actron 9680 capable of retrieving these codes?
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,225
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
I would not worry about it now as you can clear the code next week, or next year
BUT for brake flush you need SD level scanner. Hook up your Actron and see if it will give you SBC options. Don't hold your breath.
Since it is new car to you, you have to start with basic.
- fluid flush
-new pads since old one are questionable (Akebono are recommended)
-rotors careful inspection
-ABS and reluctor rings careful inspection.
BUT for brake flush you need SD level scanner. Hook up your Actron and see if it will give you SBC options. Don't hold your breath.
Since it is new car to you, you have to start with basic.
- fluid flush
-new pads since old one are questionable (Akebono are recommended)
-rotors careful inspection
-ABS and reluctor rings careful inspection.
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Thread Starter
Newbie
Joined: May 2017
Posts: 6
Likes: 1
From: Houston Texas
2003 E500
update so far
Actron 9680 only reads engine codes, so I bought a icarsoft MBII.
Replaced 4 tires to remove vibration from flat spot.
Observation: The backup battery under the hood looks to have been replaced recently.
Codes pulled: C11B3 steering angle sensor has failed several times -performed relearn procedure and cleared code.
P2403 left front wheel rpm signal sent from the traction system via the can bus is implausible (bingo! -same wheel that is locking up)
9076 CAN communication is faulty
9010 the supply voltage of the control unit is too low
SRS light was on- cleared code and reset.
Some error to do with left side fuel level sensor? -just had warranty work done on top of tank so I just cleared the code
After resetting the steering angle the ABS light came on and has stayed on.
To Do List: Going to check the LF ABS sensor and reluctor ring. Of note I haven't seen a replacement procedure for a ring w/o 4 matic option. Is it unitized with the hub?
I have new akbono pads for the rear (had them on my old 210
)
MacGyver a pressure bleed system for the brakes.
Question; are the 9XXX codes significant, (A real problem?) or just residual with the LF ABS issue?
Am I on the right track?
Replaced 4 tires to remove vibration from flat spot.
Observation: The backup battery under the hood looks to have been replaced recently.
Codes pulled: C11B3 steering angle sensor has failed several times -performed relearn procedure and cleared code.
P2403 left front wheel rpm signal sent from the traction system via the can bus is implausible (bingo! -same wheel that is locking up)
9076 CAN communication is faulty
9010 the supply voltage of the control unit is too low
SRS light was on- cleared code and reset.
Some error to do with left side fuel level sensor? -just had warranty work done on top of tank so I just cleared the code
After resetting the steering angle the ABS light came on and has stayed on.
To Do List: Going to check the LF ABS sensor and reluctor ring. Of note I haven't seen a replacement procedure for a ring w/o 4 matic option. Is it unitized with the hub?
I have new akbono pads for the rear (had them on my old 210
)MacGyver a pressure bleed system for the brakes.
Question; are the 9XXX codes significant, (A real problem?) or just residual with the LF ABS issue?
Am I on the right track?
